@startuml
allow_mixing
title SimpleDiagram
skinparam titleBorderRoundCorner 15
skinparam titleBorderThickness 2
skinparam state {
    BackgroundColor<<initial>> #87b741
    BackgroundColor<<marked>> #3887C6
    BorderColor #3887C6
    BorderColor<<marked>> Black
    FontColor<<marked>> White
}
skinparam agent {
    BackgroundColor #ffffff
    BorderColor #3887C6
}
state "place a" <<initial>>
"place a" : My custom
"place a" : place description
state "place b"
agent "t 1"
"place a" --> "t 1"
"t 1" --> "place b"
@enduml
